LM4545 AC ’97 Codec with Stereo Headphone Amplifier and National 3D Sound PRELIMINARY July 1999 LM4545 AC ’97 Codec with Stereo Headphone Amplifier and National 3D Sound General Description The LM4545 is an audio codec for PC systems which performs the analog-intensive function of the Analog Codec ’97 Rev 1.
03 Architecture.
Using 18-Bit Σ∆ A/D and D/A converters, the LM4545 provides 90dB of dynamic range.
The LM4545 was designed specifically to provide a high quality audio path and provide all analog functionality in a PC audio system.
It features full duplex stereo A/D’s and D/A’s and an analog mixer with 4 stereo and 3 mono inputs, each of which has separate gain, attenuation and mute co...

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